Same module aimed at the dominant: 6- is 2- of the 5 chord's key, 2⁷ is its 5⁷. Because it lands on 5, your real cadence is still ahead — tension stacked on tension.
hear it in “Satin Doll” — ii–V chains as melody
Lead-in — how players set it upOff 1 or 3- — the 6- reads diatonic until 2⁷ shows its sharp.From 1Δ7 so the 6-⁷ reads diatonic until the 2⁷ sharps.Or from 4 — predominant into the borrowed approach team.Follow — where it usually goes5 cadences home, or the 5 becomes 5⁷ of a bigger arrival.Suspend the arrival: 5sus holds the door before 5⁷.Or promote 2⁷ to new 5⁷ and move in up a fifth.
The 6-⁷ to 2⁷ module: hold the key's 1 (their shared tone), then step ♯4 up to 5.Target tones (in C)Am7 — lean on C (b3) · G (b7)D7 — lean on F# (3) · C (b7)G7 — lean on B (3) · F (b7)C — lean on E (3)Half-step wiresG ↘ F# · F# → G · C ↘ B · B → C · F ↘ E